A few alarm bells are starting to sound in Formula One, and not for the first time in recent history as the sport veers towards rocky financial waters.
F1's traditional European heartland is shrinking and that in itself tells its own story, with Valencia and Barcelona to alternate their hosting of the Spanish Grand Prix from next year.
Hockenheim and the Nurburgring already do so for the German Grand Prix; France long disappeared, although is making veiled attempts to regain its place; Belgium and Hungary are struggling. Full story
